CVE-2026-58252
NATS Server: Subscribe Authz Bypass via Wildcard-Overlap
CVSS Score
6.5
EPSS Score
0.5%
EPSS Percentile
37th
NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.0, 2.12.7, and 2.11.16, an authenticated user could receive messages on denied subjects when a wildcard subscription overlapped with a configured wildcard deny rule but was not a subset of it, and queue subscriptions could also affect delivery to legitimate queue consumers. This issue is fixed in versions 2.14.0, 2.12.7, and 2.11.16.
| CWE | CWE-285 |
| Vendor | nats-io |
| Product | nats-server |
| Published | Jul 8, 2026 |
| Last Updated | Jul 9, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Affected Versions
nats-io / nats-server
< 2.11.16 >= 2.12.0-preview.1, < 2.12.7
References
github.com: https://github.com/nats-io/nats-server/security/advisories/GHSA-wh7g-5m82-pmhr github.com: https://github.com/nats-io/nats-server/commit/8ced85a11497f86704a95d960281480ce037386b github.com: https://github.com/nats-io/nats-server/commit/a42a6d1e258eb5c3a2190384d31965a4b715e854 github.com: https://github.com/nats-io/nats-server/commit/e611ca9604697b02d8f22beb76037400a9cf72e6 github.com: https://github.com/nats-io/nats-server/releases/tag/v2.11.16 github.com: https://github.com/nats-io/nats-server/releases/tag/v2.12.7 github.com: https://github.com/nats-io/nats-server/releases/tag/v2.14.0